Results 11 to 20 of about 937 (213)
Barchan Dunes Cruising Dune‐Size Obstacles
Geophysical Research Letters, 2023 We investigate the behavior of subaqueous barchans reaching dune‐size obstacles by carrying out experiments where we varied the obstacle shape and size, the flow strength, and the grains' properties.
W. R. Assis +2 more
doaj +3 more sources
Birth of a subaqueous barchan dune [PDF]
Physical Review E, 2020 Barchan dunes are crescentic shape dunes with horns pointing downstream. The present paper reports the formation of subaqueous barchan dunes from initially conical heaps in a rectangular channel.
Alvarez, Carlos A., Franklin, Erick M.
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On the crescentic shape of barchan dunes [PDF]
The European Physical Journal B - Condensed Matter, 2004 Aeolian sand dunes originate from wind flow and sand bed interactions. According to wind properties and sand availability, they can adopt different shapes, ranging from huge motion-less star dunes to small and mobile barchan dunes.
P. Hersen, Hersen, P.
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"Barchan" dunes in the lab [PDF]
Comptes Rendus. Mécanique, 2002 3 pages, 4 figuresWe demonstrate the feasibility of studying dunes in a laboratory experiment. It is shown that an initial sand pile, under a wind flow carrying sand, flattens and gets a shape recalling barchan dunes. An evolution law is proposed for the
Dauchot, Olivier +10 more
core +6 more sources
EPJ Web of Conferences, 2017 We show that the orientation and morphology of bedforms occurring on top of Pluto’s smooth ice coats are consistent with an aeolian origin under conditions of unidirectional flow.
Parteli Eric J. R., Pöschel Thorsten
doaj +2 more sources
Slowdown of Dune Migration in East Asia's Inland Deserts: A 35‐Year Response to Wind Stilling
Geophysical Research LettersGlobal terrestrial stilling, the recent decrease in near‐surface wind speeds, has significant environmental impacts, including reduced dust storms and vegetation recovery in East Asia's drylands. However, direct evidence of stilling effects on sand dunes
Li Wang +7 more
doaj +2 more sources
Strong-wind events control barchan dune migration
Communications Earth & EnvironmentWind is the most important external force in shaping aeolian landforms. Yet, it remains unclear what role the strong-wind events will play in the development of aeolian landforms compared with the effect of regular winds.
Hongjing Ren +5 more
doaj +3 more sources
Resultant Force on Grains of a Real Sand Dune: How to Measure It?
Geophysical Research LettersBarchan dunes usually appear under the action of one‐directional fluid flows, being found on Earth, Mars, and other celestial bodies; however, although ubiquitous in nature, understanding dune dynamics at the grain scale is challenging due to the vast ...
R. F. Miotto +4 more
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Morphodynamics of Barchan‐Barchan Interactions Investigated at the Grain Scale [PDF]
Journal of Geophysical Research: Earth Surface, 2021 Abstract Corridors of size‐selected crescent‐shaped dunes, known as barchans, are commonly found in water, air, and other planetary environments. The growth of barchans results from the interplay between a fluid flow and a granular bed, but their size regulation involves intricate exchanges between different ...
Willian Righi Assis, Erick Franklin
openaire +2 more sources
Experimental data on barchan-barchan interaction at the grain scale
, 2021 This is part of the data concerning experiments on barchan-barchan interaction at the grain scale. Here, you find images of all patterns described as well as images of diffusion behavior. Due to the size of files, images during mass exchange process were
Righi Assis, W (via Mendeley Data)
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